The first year our school system went to a 2 weeks fall break, we took the 2 weeks and went to Disney (just my mom and my 2 youngest - DH stayed behind with high school age boys)
It was a great trip. We had an amazing time and had time to do all the little things so we weren't rushing. We did WDW, Universal, Seaworld and
Legoland. At the end of the trip we all agreed we were ready to go home. We were tired (and tired of each other

)
The things that helped us with such a long trip:
Stayed offsite at WBC. 3 bedrooms and 2 bathrooms was a lifesaver in letting us all have our own space and the extra bathroom was a lifesaver in getting away from each other.
Did Legoland last. We had never been so even though the kids were just about done getting up early on vacation, they looked forward to the last park we went to because it was something new.
Days off! I'm a commando. Park every day. Early mornings and late nights. This long of a trip gave us plenty of time to take a few days off to just hang by the pool, hang in the condo and watch movies etc.
Rotated early mornings and late nights. With so many park days, we were able to sleep in a few days instead of trying to make rope drop every day.